Integration tests + tag if new version

[gligorkot]

What did you implement:

Closes #645

Updated integration tests workflow to run node and python integration tests, but only barely - removed the tests that were trying to deploy to Azure. Node workflow also runs validation script and the node tests.

Note:

The "Tag if new version" job runs as per Serverless framework repo here https://github.com/serverless/serverless/blob/a6bcc62182b6fe974d12d547c00e560882c55e05/.github/workflows/integrate.yml#L171.

In order for this to job to work a USER_GITHUB_TOKEN secret needs to be added with the 'serverless-ci' user authentication token as per Serverless framework. As per https://github.com/serverless/serverless/blob/a6bcc62182b6fe974d12d547c00e560882c55e05/.github/workflows/integrate.yml#L188-L190

How did you implement it:

Added integration.yml in the github workflows.

How can we verify it:

The workflow will run once the PR has been merged, but you can verify the last run in my repository here https://github.com/gligorkot/serverless-azure-functions/actions/runs/4964935025

Todos:

Note: Run npm run test:ci to run all validation checks on proposed changes

• Ensure there are no lint errors.
  Validate via npm run lint
  Note: Some reported issues can be automatically fixed by running npm run lint:fix
• Write tests and confirm existing functionality is not broken.
  Validate via npm test
• Write documentation
• Provide verification config / commands / resources
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[medikoo]

Looks very good to me. Thank you @gligorkot !